CVE-2023-4299 : Exploit Details and Defense Strategies

This CVE-2023-4299 involves a vulnerability in the Digi RealPort Protocol that can potentially allow an attacker to conduct a replay attack, leading to the bypassing of authentication and unauthorized access to connected equipment.

Understanding CVE-2023-4299

This security issue affects various products of Digi International, creating a critical situation with high impact on confidentiality, integrity, and availability.

What is CVE-2023-4299?

The CVE-2023-4299 vulnerability is centered around the Digi RealPort Protocol, which is susceptible to a replay attack. Exploiting this weakness can enable an attacker to bypass authentication mechanisms and gain unauthorized access to connected devices.

The Impact of CVE-2023-4299

The impact of this vulnerability is severe, with a high CVSS base score of 9 and a critical base severity level. The attack complexity is considered high, and it can be executed over a network without the need for any user interaction.

Technical Details of CVE-2023-4299

This security flaw in the Digi RealPort Protocol is defined by a CVSS v3.1 vector string of "AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H." The vulnerability lies in the use of a password hash instead of a password for authentication, posing risks to confidentiality, integrity, and availability.

Vulnerability Description

The vulnerability allows for a replay attack that could potentially enable unauthorized users to bypass authentication measures and gain access to connected equipment.

Affected Systems and Versions

Numerous products offered by Digi International are impacted by this vulnerability. Specifically, versions of Digi RealPort, Digi ConnectPort, Digi ConnectPort LTS, Digi Connect ES, and several other Digi products are at risk.

Exploitation Mechanism

The vulnerability in the Digi RealPort Protocol can be exploited by malicious actors to carry out replay attacks, thereby compromising the security of connected devices and equipment.

Mitigation and Prevention

To address CVE-2023-4299, immediate steps should be taken to mitigate the risks and prevent potential exploitation.

Immediate Steps to Take

It is crucial to restrict access to Digi devices on specific TCP ports, enabling communication only between authorized workstations and field equipment. Users are advised to consult device configurations and adjust port settings accordingly to enhance security.

Long-Term Security Practices

Implementing stringent access control measures, network segmentation, and regular security audits can help bolster overall security posture and prevent similar vulnerabilities in the future.

Patching and Updates

Digi International has released patches for the affected products, including RealPort software for Windows, Digi ConnectPort TS 8/16, Digi ConnectPort LTS 8/16/32, and Digi Connect ES. Users are strongly recommended to acquire and install these patches to address the CVE-2023-4299 vulnerability effectively.